#define _CRT_SECURE_NO_WARNINGS 1
#include "string.h"

namespace wusaqi
{
	void test01()
	{
		string s1;
		cout << s1.c_str() << endl;
		string s2("hello world");
		cout << s2.c_str() << endl;
	}
}

int main()
{
	wusaqi::test01();
	return 0;
}